Double-walled vessel.



G. P. ALTENBERG (u) BOEHM.

DOUBLE WALLBD'VESSEL. APrLIoA'rIoN FILED APR. so, 190e.

Patented May 2, 1911.

UNITED sTATEs PATENT oEEioE.

GEORGE P. ALTENBERG AND FRANZ BOEHM, OF CINCINNATI, OHIO; SAID BOEHMASSIGNOR TO SAID ALTENBERG.

DOUBLE-WALLED VESSEL.

Specification of Letters Patent.

lApplication filed April 30, 1908.

Patented May 2, 1911.

Serial No. 430,167.

To all whom itmog/ concern:

Be it known that we, GEORGE I. AL'IEN- nunc and Fniisz Bomm,respectively a citizen of the United Sta-es of America and a subject otthe lml'feror ot' Germany, residing at Cimfinnati. in the county ofllamilton and State ot Ohio, have jointly invented certain new anduseful Improvements in Double-falled Vessels, of which the following isa specification.

lt is the object of our invention to provide a double walled vesselcomprising an inner member and an outer member connected at the mouth ofsaid vessel, and new and improved means for separating or supportingsaid members from each other, and the invention will be readilyunderstood from the followingdeseript-ion and claims, and from .thedrawing, in which latter:

Figure l is a central Vertical longitudinal section of our improved device on the line- :1J-w of Fig. 2. Fig. 2 is a bottom View of i thesame. Fig. 3 is an enlarged detail of the bottom of the vessel, insection on the line :vw-a; of Fig. 2; and, Fig. 4 is a similar detail insection on a line corresponding to the line y-Jg/ of Fig. 3. i

1 represents the inner member of the vessel and 2 the outer memberthereof which are connected at the mouth 3 of the vessel for forming aspaee 4 between said members. The vessel is preferably formed of glass.

The space surrounds the inner member of the vessel. This space is aheat-insulating space, and the air in it is preferabl withdrawn orpractically exhausted for orming a vacuum. The air may be n'fit-hdrawnthrough a nipple' 5 which is afterward sealed. The wall of the space mayalso `be provided with suitable silvering solution. Between the bottomsof the members we provide a cushion adapted to form a support betweensaid members preferably both in vertical direction and also laterally sothat 'the members of said vessel may`besupported from each other. Thiscushion w'e prefer to form of a block 6 of preferably -Vheat-insulatingmaterial, for instance, asbestos or other suitable material, againstwhich a coil-separator 7, preferably in spiral form, is cushioned. Thiscoil-separator is preferably arrangedabout the longitudinal axis ot' thevessel. terlal around which glass can be formed or fused, and we havetound copper a sultable It is prete 'ably composed of a ma when socont-acting, shall be slightly embedded in the wall of said member, asshown at 8, for definitely positioning said coil-separator. Thisembedding is accomplished by 'locally heating the glass and4 forcing itabout the sides of the coils in plastic state. The cushion-block mayalso bereceived in the interstices between the coils of thecoilseparator, as shown att). If desired the bottom of. the inner membermay be provided with an indentation 1() received into the cushion-block,and the bottomA of the outer member be provided with an indentation 11about which the coil-separator is arranged. We prefer toarrange thecoil-separator in the space between the members of the vessel about thelongitudinal axis -of the vessel, with the sides of the coilsl of thecoil-separator presented toward the inside walls of-said members.

Having thus fully described our invention i what we claim as new anddesire to secure by Letters Patent is:-

1. A double walled vessel comprising in combination an innermember andan outer member connected at the mouth of saidvessel and havingheat-insulating space between said members. and a coil-separatorand'cushioni'ng block therefor between the bottoms of said members insaid space. 4

2. A double walled vessel com rising in combination an inner member anan outer member connected at the mouth of said vessel and havinglieat--insulatin v space between said members, and a s irai separatorund cushioningblock there or between the bottoms of said members in said'space surroundingthe' longitudinal axes of said members. r A

8. A double Walled vessel comprising in combination an inner member andan outer member having a heat -insulating Space* therebetween, and a'spiral separator in said space betweensaid members arranged with' thesides of the spirals thereof presented toward said members and'said sirels Abein out of arallel planes, with the ongitudina axis ,o saidvessel, substantially as shown and described.

4. A double walled glass vessel comprising in combination an innermember and an outer member havinga. heat-insulating space therebetween,a, coil-separator and a blockoushion therefor in sald space between saidmembers, said coil-separator having the Sides of the coils thereofresented toward said members and arrange about the lon itudinal axis ofsaid vessel, with said co1ls embedded in the lass of said vessel,substantiall as descri ed.

5. A ouble walled glass' vessel comprising in combination an innermember and an outer member having a heat-insulating space therebetween,a coil-separator and a cushion therefor in said space between saidmembers, said coil-separator having the lsides of the coils thereofpresented toward said members and arranged about thelongitudinal axis ofsaid vessel, with one 4side of\the coils of said coil-separator embeddedin the glass of said' vessel and said cushion received in theinterstices between said coils at the other side thereof.

6. A double walled vessel com rising in combination an inner member anan outer lmember having a heat-insulating space cushion-block thereforin said space between therefor in said space between said members,`

said coil-se arator having the sides of the coils thereodpresentedtoward-said members' about the longitudinal axis of and arrang saidvessel with the coils of said coil-separator embedded in said cushion.

8. A double-walled vessel com rising in combination an inner member anan outer member connected at the mouth of said vessel and havingheat-insulating space between y said members, and a coil-separator andcushioning block therefor between said members,

the coils of said coil-se arator bein presented sidewise to said cus4ionin blocg. l

In testimony whereof, we ave subscribed our names hereto in thepresenceof two subscribing witnesses.

1 GrISIORGrE P. ALTENBERG. v FRANZ BOEHM. Witnesses:

EABLE R. PAssm., FLORENCE QUINN.

